China high Precision Anaerobic Annealed Steel Tube manufacturer
We’ve got our personal profits workforce, design and style team, technical group, QC crew and package workforce. We have now strict good quality handle procedures for each process. Also, all of our workers are experienced in printing subject for China high Precision Anaerobic Annealed Steel Tube manufacturer, We believe we will become a leader in developing and producing high quality products in both Chinese and international markets. We hope to cooperate with more friends for mutual benefits.
We’ve got our personal profits workforce, design and style team, technical group, QC crew and package workforce. We have now strict good quality handle procedures for each process. Also, all of our workers are experienced in printing subject for anaerobic annealed steel tube, Our company always concentrate on the development of the international market. We now have a lot of customers in Russia , European countries, the USA, the Middle East countries and Africa countries. We always follow that quality is foundation while service is guarantee to meet all customers.
Brief Introduction
Anaerobic annealed tube for bending and flaring is a delivery condition type under DIN 2391/EN10305 and SAE J524. Anaerobic annealed steel pipes: cold rolled or cold drawn precision steel pipes are put into nitrogen or atmosphere shielding gas, and normalized or annealed at different temperatures according to different materials of precision steel pipes.
Parameters:
| Grade | ST35/E235 ST37.4 ST45/E255 ST52/E355 |
| Standard | DIN2391 DIN1630 EN10305 DIN2445 JIS G3445 SAE J524 |
| Delivery Conditon | NBK(+N) BK(+C) GBK(+A) BKW(+LC) BKS(+SR) |
| Length | 6m or as Customers’request |
| Tolerance | Outer Diameter: According to Standard |
| Thickness: According to Standard | |
| Finish | Galvanized surface (Sliver/Yellow/Colorful) |
| Zinc coating of 8-12um | |
| Application | Hydraulic System;Car/bus;construction vehicle |
| Delivery time | A.7 days if this goods is stock goods. |
| B.20 days if this goods will be produced after order |
Delivery Condition
| Designation | Symbol | Description |
| Cold finished (hard) | BK(+C) | Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation |
| Cold finished (Soft) | BKW (+LC) |
The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding) |
| Cold finished and stress-relieved | BKS(+SR) | Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree. |
| Annealed | GBK(+A) | The last Cold forming process is followed by annealing in a controlled atmosphere. |
| Normalized | NBK(+N) | The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere. |
Certificates: According to EN 10204 3.1
Inspection Items:
Tensile stength, Yield stength, Elongation, Flattenging, Flaring;
Chemical analysis
Eddy Current Test 100%, Size and surface checking 100%
Other test item can be arranged by A Third Party as per request.
